Guidelines for ammunition to be used with Kirst Cartridge Konverters:
Use only lead bullets with black powder or an equivalent low-velocity smokeless powder load in centerfire Kirst Cartridge Konverters. Do not use centerfire Konverters in brass framed revolvers, only .22 rimfire Konverters can be used in brass framed revolvers.
(.22 caliber rimfire Konverters can be used with these .22 caliber cartridges: .22 Short, .22 Long, or .22 Long Rifle).
Note: “Cowboy Action Ammunition” are smokeless powder loads for target shooting, which are the equivalent of black powder rounds. This ammo is safe to shoot in conversions and pleasurable to shoot as well.
Please refer to manufacturers data and follow all safety precautions, we will not recommend any loading data as manufacturers change and update their powders and loading data frequently. Never use high-power or magnum loads.
In 2021, we started machining our .38 caliber Konverter cylinders with .358 throats to match the standard diameter of .38 Special bullets.
The.38 Special Kirst Konverter (with .358” diameter throat): will handle standard .38 Special, .38 Long Colt, and .38 Short Colt, low velocity target rounds; i.e., black powder or Cowboy Action Ammunition. Note: Will not accept .38 S&W Short cartridges, .38 S&W Long cartridges or. 38 caliber Heeled Base Bullets! A .36 caliber percussion revolver barrel has a larger diameter than a .38 caliber bore; for the best accuracy use .38 caliber, HOLLOW base, lead bullets.
.38 “Heeled Base” Kirst Konverter (with .375” diameter throat), add $30.00 for this option: The .38 Heeled Base Kirst Konverter is also available for those wishing to load and shoot historically accurate Heeled Base lead bullets in their 1851 and 1861 Colt Navy revolvers. (Will not accept .38 S&W). This model Konverter is only needed if you load and shoot .38 caliber Heeled Base lead bullets.
All .44 caliber Cap & Ball revolver barrels are machined with the exact same bore dimensions (.452" nominal) as the bore of a .45 Long Colt revolver. Therefore, the barrels of these .44 caliber Cap & Ball revolvers will accurately shoot .45 Long Colt, .45 Schofield, or even .45 ACP lead bullets.
Here are some suppliers of “Cowboy Action Ammunition”:
- Buffalo Arms: https://www.buffaloarms.com/ammunition/cowboy-ammo.html
- Black Hills: http://www.black-hills.com/product-category/cowboy-ammo/
- Midway USA: https://www.midwayusa.com/s?searchTerm=Cowboy+Action+Ammunition